Method of manufacturing stratified fibrous materials.



UNITED STATES PATENT OFFICE.

MAX MEIROWSKY, OF COLOGNE-LINDENTHAD, GERMANY.

METHOD OF MANUFACTURING STRA'I'IFIED FIIBROUS MATERIALS.

No Drawing.

To all whom it may concern:

Be it known'that I, MAX ME'IRowsKY, subject of the King of Prussia,German Emperor, and resident of Cologne-Lindenthal,

Germany, have invented certain new and useful Improvements in Methods ofManufacturing, Stratified Fibrous Materials, of which the following is aspecification, reference being had therein-to the accompanying drawing.

This invention relates to the manufacture of Stratified fibrousmaterials, more particularly for chemical and electrical insulatingether reliably,

nish partly flowed out and was driven out nating the separate layers ofpaper not only with oil material-and that lightly-but after thistreatment they are overlaid with a resinous material, whereupon theseparate layers are j oinedin known manner by application of pressureand heat. In this way the resin does not serve to impregnate the paperin the known manner but only as a means to stick the separate paperlayers tonotwithstanding the previous saturating in'oil, and to givemechanical strength to it. The resulting bodies or materials are capableof resistance to the greatest extent mechanically and chemically,as-well, as electrically. A

In the stratified bodies or materials hitherto known the separate layersof which.

were treated with resin varnish, upon applicationofuthe pressure andheat the varfrom the fibers of'the paper, which owing to this werepartly made capable of taking up other liquids or atmospheric moisture.All the same, materials and bodies of this kind have proved valuable toa'prominent extent, particularly in the electrical industry, but also inthe chemical 1ndustry,espe- Specification of Letters Patent.

and wound around a core.

platesor tubes and cylindrical bodies result cially when a syntheticresin was employed instead of a vegetable resin. In the present process,however, the oil varnish which has passed into the fibers of thepaper'remains unchanged in its place, in spite of the pres.- sure andthe heat, While the resin varnish becoming liquid intimately connectstogether the superposed sheets of paper. Such finished materials orbodies of materials hitherto have been treated only with resin. Chemicalreagents which are capable of gradually destroying the resinous layersare Patented J an; 12, 1915. Application filed June 27, 1914. Serial No.847,720.

met in the material produced according to- I the novel process with aresistance in the inclosed layers of oil. This resistance is sogreatthat the paper bodies can be employed in the chemical industry, forexample, for storing and conducting etching liquids, while in theelectrical industry they are used for insulators in secondary batteries,oil switches, transformers and such like oil or in apparatus working indamp places.

The separate sheets of paper-treated with oil and resin can be unitedunder pressure and heat by piling several layers one upon another anduniting in the press, or, however, according to the roller process insuch a' manner that a continuous sheet of paper is warmed and subjectedto suitable pressure In this Way as is in itself known. The resinousmaterial can be vegetable or synthetic. Instead of paper, whichpreferably is chosen quite thin, other fibrous layers can be employedalso.

' Having now particularly described and ascertained the nature of mysaid invention,

' and in what manner the same is to be performed, I declare that what Iclaim is A method of manufacturing Stratified fibrous materialsconsisting in impregnating the sheets with oil, overlaying the oiledsheets with resin, superposing the sheets and subjecting the same toheat and pressure. I K

In testimony whereof I/aflix my signature in the presence of twowitnesses.

g MAX ME'IBOWSKY. Witnesses 'LOUIS VANDORF, HANS STUMGES.'-

ioo

